Method , arrangement and use for and of, respectively, a vane damper.

ABSTRACT

A vane damper ( 1 ) comprises a body ( 2 ) with a space for at least one rotatable vane which divides the space into two part spaces ( 6   a   , 6   b ) which are located on either side of the vane and, because of the rotatability of the vane, are variable and which is mounted in the body by means of a bearing member and operates in a working medium ( 16 ) which is located in the space and, via a throttle function, can be transferred between the variable part spaces to produce the damping characteristic. The vane with associated bearing member is produced by means of extruding aluminium. The extruded product is cut for production of the respective vane with associated bearing member. The respective vane is provided with sealing members which establish a seal against the relevant surfaces of the space and of the bearing member.  
     It is proposed that FIG.  1  accompany the abstract.

TECHNICAL FIELD

1. The present invention relates to inter alia a method of producing avane damper which comprises a body with a space for at least onerotatable vane which divides the space into two part spaces which arelocated on either side of the vane and, because of the rotatability ofthe vane, are variable. The vane is mounted in the body by means of abearing member and operates in a working medium (hydraulic oil) which islocated in the space and, via one or more passages or throttlefunctions, can be transferred between the variable part spaces toproduce the damping characteristic of the shock damper. The inventionalso relates to a vane damper itself and also an arrangement for a vanedamper and use of one or more extruded aluminium or alloy products whichcan be cut in order to produce units.

STATE OF THE ART

2. Vane damper constructions are known per se. For example, it ispreviously known, in connection with steering gear, for motorcyclehandlebars for example, to use vane dampers in order to counteractforceful steering movements. In connection with toilet seats, it is alsopreviously known to use vane dampers in connection with seats which canbe raised and lowered. The known vane dampers are each provided with oneor more spaces, in which one or more vanes operate. The body of the vanedamper also has a bearing space for the bearing part of the vane, whichpart may comprise a cylindrical part, by means of which the vane can berotated in a cylindrical recess. The cylindrical part has a projectingspindle or equivalent member which is intended to engage in a part inthe vehicle or equipment which is to be damped (shock-damped) in itsmovements.

DESCRIPTION OF THE INVENTION Technical Problem

3. Problems of space often arise in connection with vehicles andequipment which are to be provided with shock dampers. In vehicles inthe form of cars for example, the so-called packing problem forcomponents is significant. Conventional shock dampers are tied to acertain given shape (elongate shape) which in various connections it isdesirable to be able to change and vary to a great extent so that theshock dampers in the vehicle do not encroach on the passenger or baggagespace, for example, or force the car constructor to depart from theshape of the external design desired. The possibility of changing orvarying the external shape and dimensions of the shock damper must notbe exploited at the expense of the functioning of the shock damper. Thepresent invention aims to solve inter alia this problem.

4. It is moreover desirable to be able to reduce the weights of shockdampers considerably. In the case of particularly low-consumptionvehicles, every reduction in weight is important. In this connection,the overall effect of reduction of the weight of the vehicle is to betaken into account. It is not only the advantages which can be achievedby weight reduction in the shock damper itself but also the resultanteffects from the point of view of weight reduction which apply for thevehicle as a whole thanks to the shape of the shock damper that are tobe borne in mind. As far as weight reduction on the shock damper itselfis concerned, there is a requirement to be able to reduce the weight ofthe shock damper by 20-40%. The invention solves these problems also.

5. There is also a requirement to be able to make more efficient andautomate to a great extent the manufacture of modern shock dampers.Shock dampers for vehicles constitute a so-called mass product whichmust be supplied rapidly and efficiently at the same time as the shockdamper function can maintain the high level of functioning andperformance aimed for. The invention solves these problems also.

6. In connection with the new shock dampers, it is important to be ableto avoid suction cup effects between the movable vane and walls oppositethe latter in the body space. Furthermore, it is to be possible to avoidthe release of air and of light fractions in the working medium used.The accumulator function which is to allow the working medium to expandand contract according to temperature changes in the shock damper andits surroundings must be able to function in spite of demands for newgeometries and reduced external dimensions. The invention solves theseproblems also.

7. It must be possible for the mounting of vane dampers in the vehicleconcerned to be clear and to function well. It must be possible to carryout machining of the interacting surfaces between the pivotable vane andthe relevant surfaces of the body very easily. The interacting surfacesmust be easily accessible for machining tools during manufacture and itmust be possible to reduce the amount of machining/treatment itself aswell as the size of the surfaces which are to be machined. The inventionsolves these problems also.

8. It is also important that the shock damper function itself can beperformed in a rational manner so that the desired dampingcharacteristics and functions can be maintained. Inter alia, the actionof the bleed function arrangement for reducing damping forces in thecase of small movements must be long-term and not easily stopped up byproducts in the working medium. The invention solves these problemsalso.

9. It is to be possible for the new shock dampers to operate with a longservice life and require little or no service. The invention solves thisproblem also.

SOLUTION

10. A method according to the invention can be considered to be mainlycharacterized in that the vane with associated bearing member isproduced by means of extruding aluminium or alloy, in that the extrudedproduct is cut for production of the respective vane with associatedbearing member and in that the respective vane is provided with sealingmembers which establish a seal against the relevant surfaces of thespace and of the bearing member.

11. In one embodiment of the inventive idea, the tubular side wall ofthe body is also made by extruding aluminium or alloy. The extruded sidewall product is cut to produce the respective body side wall and sideparts sealing the space are fixed to the respective cut side wall, whichparts can be fixed by means of adhesive bonding, rivets, bands, weldingetc. In a further embodiment, only certain parts of the surfaces of thebody, which interact with the movable surfaces of the vane, are sealed.In the bottom part of the body, a recess or a groove can be formed,which makes it possible for the working medium, for the purpose ofperforming the bleed function, to pass between the part spaces within afirst operating range of the vane. Within this operating range, thevehicle or corresponding equipment concerned is provided with damping bythe shock damper when the vehicle or equivalent is subject to a smallload or a small force. In a second operating range of the vane, thelatter operates beyond said groove in order that stronger damping, thatis to say without the bleed function, is effected in the secondoperating range. This is advantageous in the case of loads in and greatforces on the vehicle. In connection with production of the extrudedproduct, asymmetrical ducts are formed, in the body, between said partspaces and a space which serves as a gas accumulator space, into whichit is possible for the working medium to expand against the action or agas medium located in the space and to contract with the aid of said gasmedium.

12. A vane damper according to the present invention can be consideredto be mainly characterized in that the body is, in its upper end part,designed with a second space which contains gas and in that the firstand second part spaces are interconnected via one or more passages viawhich the working medium in the first space is afforded the possibilityof expanding to the second space when the working medium expands andalso the working medium in the second space has the possibility of beingmoved back to the first space with the aid of the gas when the workingmedium decreases in volume.

13. In a preferred embodiment, said one or more passages are designed tothrottle the working medium more in a first direction from the firstspace to the second space than in a second direction from the secondspace to the first space.

14. A vane damper according to the present invention is mainlycharacterized in that, in the fully rotated position of the vane in afirst direction, a first side part space remains so as to preventadhesion effects between the mutually opposite surfaces of the vane andof the body and also release of air or light fractions in the workingmedium. In the fully rotated position in a second direction, a secondside part space is present in order to prevent adhesion effects betweenthe opposite surfaces in this case of the vane and of the body and alsoto prevent said release effects in the working medium.

15. A vane damper according to the invention can be considered to bemainly characterized in that there are arranged in the vane one or morecontinuous holes and one or more shims arranged at this or thesehole(s), by means of which hole(s) a damping force/dampingcapacity/damping characteristic brought about by the vane can beeffected. In or near the vane, one or more connections can also bearranged between the part spaces, which connections perform one or morebleed functions, for example one or more grooves arranged in thedelimiting surface of the body, where different grooves and grooveshapes can provide bleed functions of different nature.

16. An arrangement according to the invention can be considered to bemainly characterized in that only a part of the space inner surfacesundergoes machining which ensures an effective sealing function by meansof sealing members.

17. One embodiment includes, among said space inner surface parts, afirst curved space inner surface which is opposite the free end edgesurface of the vane, which curved space inner surface is finished so asto ensure functionally reliable sealing by means of and via a sealingmember arranged at the curved surface and the front end edge surface,preferably fixed on the free end is edge of the vane, when the frontedge of the vane sweeps over the curved inner space surface in theperformance of its damping function/damping characteristic.

18. A further embodiment also includes curved inner space surfaces whichare opposite an outer surface on a cylindrical bearing part belonging tothe vane, by means of which part the vane is mounted in a circular spacein the body. Only parts, for example between 10 and 30%, of said curvedinner space surfaces are machined so as to bring about reliable sealingbetween said outer surface and the parts of the curved inner spacesurfaces with sealing strips, preferably located on or in thecylindrical bearing part, in between.

19. In a further embodiment, the side parts of the body, which, togetherwith the tubular side wall of the body, are only partially machined(that is to say ground, polished etc.) to bring about reliable sealingbetween the upper and lower edges of the vane with sealing strips,preferably fastened to the vane, in between.

20. An arrangement according to the present invention can be consideredto be mainly characterized in that the bearing unit of the vane isprovided with a hole, in which a rotating member, for example a rotaryspindle, belonging to a part (chassis, wheel, vehicle etc.) extends, themovements of which part are to be damped by the vane damper.

21. In one embodiment, the body is anchored in a vehicle or in a unit onor in which damping is intended to be performed by means of the vanedamper, and the part which is to have its movements damped belongs to oris mounted in the vehicle/unit.

22. A use according to the invention can be considered to be mainlycharacterized in that the extruded aluminium or alloy product(s) whichcan be cut for production of units is characterized in that saidproduct(s) is (are) used in order to produce as units a vane withassociated bearing part, forming part of a vane damper, and/or a tubularside wall forming part of the body of a vane damper.

ADVANTAGES

23. According to the above proposals, a rational and functionallyreliable vane shock damper can be produced at relatively low cost whenthe price and design of the vehicle are taken into consideration also.Great packing density can be achieved in the vehicle/equipment concernedthanks to a changed external variable geometry and often reducedexternal dimensions. Great reductions in weight on the shock damperitself can be achieved. Furthermore, weight reductions and designadvantages can be achieved on the vehicle itself.

DESCRIPTION OF THE FIGURES

24. A for the present proposed embodiment of the method, the vanedamper, the arrangement and the use according to the invention is to bedescribed below with simultaneous reference to the accompanyingdrawings, in which

25.FIG. 1 shows a vertical view of a first exemplary embodiment of avane damper with a body and a vane arranged therein,

26.FIG. 1a shows a vertical section from the side of the vane damperaccording to FIG. 1,

27.FIG. 1b shows a cross-section of the damper according to FIG. 1 alongsection line A-A,

28.FIG. 1c shows a section B-B of the damper according to FIG. 1,

29.FIG. 2 shows a vertical view of a second embodiment of a damper witha body and associated vane,

30.FIG. 2a shows a vertical section from the side of the damperaccording to FIG. 2,

31.FIG. 3 shows an enlarged vertical view of parts of the damperaccording to FIG. 1,

32.FIG. 3a shows a cross-section of the construction and placement of asealing member/sealing strip which is used in the embodiments accordingto FIGS. 1 and 2,

33.FIG. 4 shows in principle and from below the mounting of the vanedampers in a wheel suspension in a vehicle, and

34.FIG. 4a shows parts of the wheel suspension according to FIG. 4 seenfrom the side.

DETAILED EMBODIMENT

35. In FIGS. 1a and 1 b, a vane damper/vane shock damper is indicated by1. The body of the damper is indicated by 2. In principle, the bodyconsists of two halves 2 a, 2 b which are assembled via a parting plane3. The halves can be assembled by means of members which hold themtogether which are indicated by 4, 4′. Said members can be in the formof a steel band but may also be in the form of adhesively bonded joints,rivets, welds etc. The halves are provided with weight-reducing recesses5 on the outside. The body 2 a, 2 b contains a first space 6, a secondspace 7, which is connected to the space 6, and a third space 8. A vane9 is arranged rotatably in the first space 6. The vane has a vane-shapedpart 9 a which operates in the space 6 in a working medium in the space,and a cylindrical part 9 b which is mounted in said second space 7 whichhas a corresponding cylindrical shape for the cylindrical part 9 b. Thebearing part 9 b has a continuous hole 10, via which coupling to aspindle 11 or equivalent member can take place. The spindle 11 (or themember) is connected to the unit via which the damping function is to beperformed on a vehicle or equivalent (see below). The hole 10 has a “keygrip” so that rotary movements 12 can drive the vane 9 relative to thebody, or rather that the vane can exercise the damping capacity on thespindle 11 concerned and its movements 12.

36. The vane can move between two outer positions 9′, 9″. The vane mayhave passages for working medium. In the present case, the vane has twopassages which may take the form of holes 13, 14 which pass through thematerial of the vane and at which shims (shim packs) 15 are arranged.The shims/shim packs are mounted on either side of the vane, only theshims/shim pack for one hole 14 being shown in the figure.

37. The vane is rotated relative to the body via the rotary functionmentioned above. During rotation, the working medium 16 passes via thepassages and the shims offer resistance to the rotary movement whichgives the damper its characteristic. The bleed function, which affords asmall amount of damping against small movements around zero, can also bearranged in or near the vane (see below). The vane 9 a can be consideredto divide the first space into two part spaces 6 a, 6 b on either sideof the vane, which vary in size. In the outer positions, there areremaining part spaces 6 a′, 6 b′, which affords significant advantagesby virtue of the fact that the respective side surface 9 c (only oneside surface is provided with a reference) on the vane does not come upagainst the opposite inner surface 2 c in the body, which preventssuction cup effects, releases of air and light fractions in the workingmedium etc. The vane has a weight-reducing recess 9 d adjacent to thetransition to the bearing part of the vane. The damper has a top sideand a bottom side. The top side is in this connection directed upwardsin the figure and the bottom side is accordingly directed downwards inthe figure. The section of the damper shown in FIG. 1 is characterizedby a long narrow unit which widens somewhat from the bottom partsupwards. The embodiment is highly integrated and the integration alsoapplies to said first space 8 (see below). In the view according to FIG.1, it can be seen that the vane damper is essentially rectangular.

38. At its free end 9 e, the vane is provided with a sealing member in arecess 17 which is described in greater detail below. On the upper andlower sides also, the vane is provided with a sealing member/sealingstrip 18 which seals against side surfaces 2 e, 2 d on the inside of thebody. The sealing strips 18 are mounted eccentrically on the vane in thesection according to FIG. 1 and run along one side edge of the vane,which is an advantage (see below).

39. The sealing member 17 seals against a curved surface/top surface 19on the inside of the body. Close to the bearing member 9 b, thecylindrical bearing housing of the vane is provided with two seals 20,21 which are shown in two positions, the second positions having beenindicated by 20′ and 21′ respectively. The seals 20 and 21 move alongsealing surfaces a and b which together have a length, in the viewaccording to FIG. 1, of roughly 10-30% of the total circumference of thebearing housing. One of the advantages of the construction shown is thatonly the side surfaces 19, 20 and 21 of the surfaces of the bodyextending towards the plane of the paper in FIG. 1 need to be finished(polished, ground etc.) to a given degree of fineness at which reliablesealing is guaranteed between the vane and the relevant surfaces of thebody. Only limited parts of the surfaces 2 c and 2 d require furthertreatment with regard to degree of fineness. Those parts of the surfaces2 c, 2 d which lie within the sealing member 18 in the two outerpositions of the vane need to undergo machining corresponding to that ofthe side surfaces. No requirements exist for the remaining surfaces inthe interior of the body. When the halves have been produced in a knownmanner by extrusion, the limited requirements for machining of the totalnumber of inner surfaces in the body make manufacturing advantageous.The eccentricity of the mounting of the sealing member 18 means thatmachining in sharp corners can essentially be avoided and only needs tobe carried out in one place. FIG. 1b shows that only 2 c′needs to betreated. FIG. 1b also shows a groove extending in the transversedirection, which can be used as a bleed. By virtue of the fact that thegroove extends only partially in the transverse direction, the vane canoperate with two damping levels. When the vehicle or equivalent issubjected to great load or great force, it is often advantageous toeffect stronger damping in the case of smaller movements also. By virtueof the vane operating on inner surfaces which do not have saidtransverse groove, the damping concerned can be made stronger in thecase of movements around zero. On the other hand, in the case ofrelatively little load on the vehicle or small forces acting on thesame, it is often advantageous to make use of a bleed function which canbe performed by means of said groove which extends over the relevantoperating range of the vane in the case in question. FIGS. 1a and 1 balso show that it is possible to avoid sharp corners on surfaces whichare to be machined.

40. According to FIG. 3, the body is also provided with ducts 23, 24which are produced in conjunction with the extrusion and need to undergoonly relatively little finishing. In the event of increases intemperature, the working medium 16 can be allowed to expand through theducts into the space 8 against the action of gas pressure from a gas 25which is confined in the space 8. FIG. 3 shows how the working medium 6′has been forced into the ducts 23, 24 and how the working medium 6′ hasalso expanded into the space 8, all against the action of the gas 25.Conversely, the medium can be reduced in volume with the aid of the gasand returned completely or partially to the first space. In this way,the working medium is kept pressurized irrespective of the temperatureinvolved, which counteracts air release etc.

41.FIG. 3 also shows holes 26 for rivets which are used for the purposeof assembly. The holes are located in both the body halves concerned andrun through these.

42.FIG. 3a shows the type of strip which is used on the vane accordingto the above. The strip 27 consists in a known manner of various layers,teflon 27 a, bronze 27 b and steel 27 c. The strip is mounted in itsrecess 28 in the vane against the action of a ring 29 arranged on theunderside. The ring also prevents medium being conducted under thestrip.

43.FIG. 2 shows a second embodiment, in which both shim packs 15′, 15″are shown. The groove 22′ which is used for the bleed function is alsoshown. In the case shown, the body is formed by a tubular side wall, seeFIG. 2a, which can be extruded and cut to the correct height dimensions.Side parts 31, 32 are mounted on the side walls by means of welding 33.Alternatively, adhesive bonding is used, together with said rivets,steel bands etc.

44. The vane has a height h, which in the exemplary embodiment, isroughly 25 mm and a total height H of roughly 50 mm. The length L isroughly 170 mm and the width at the widest point roughly 77 mm, that isto say the vane damper construction is extremely compact.

45.FIG. 4 shows in principle a wheel suspension from the underside of avehicle. A frame 34 is mounted firmly in bearings 35, 36 and has in itscentral part projecting spindles 34 a, 34 b, on which the vane dampers36, 37 according to the above are mounted with their upper partsextending up perpendicularly in the plane of the paper. The spindles 34a, 34 b correspond to the spindle 11 in FIG. 1a. The wheels 39, 40 arein principle suspended on or at the ends of the parts 34 c and 34 drespectively, which extend essentially perpendicularly from said centralpart 34. FIG. 4a shows the mounting of the vane damper in a side view,the body being anchored on the chassis 41 via an anchoring member 42.

46. As far as the flow of the working medium between the spaces 6 and 8is concerned, the shapes of the passages cause the working medium to bethrottled more in the case of flow from the space 6 to the space 8 thanin the other direction. This is because, at the throttle parts 23 a, 24a (see FIG. 3), the passages widen outwards towards the space 8, theducts 23 and 24 being widest at their opening into the space 8.

47. According to the above, extruded aluminium or alloy products canthus be used in order to produce a vane or vane parts for vane dampersand/or tubular side walls which form part of the body of the vanedamper.

48. The respective vane is, in the sectional view according to FIG. 1,assigned a shape which tapers from the bearing housing towards the freeend. Close to the bearing housing, the vane has said weight-reducingrecesses 9 d and, in the front, tapering part, the vane has saidpassages and shims/shim packs and, if appropriate, holes which performthe bleed function.

49. The invention is not limited to the embodiment illustrated above byway of example but can be modified within the scope of the patent claimsbelow and the inventive idea.

What is claimed is:
 1. Method of producing a vane damper (1) whichcomprises a body (2) with a space (6) for at least one rotatable vane(9) which divides the space into two part spaces which are located oneither side of the vane and, because of the rotatability of the vane,are variable and which is mounted in the body by means of a bearingmember (9 b) and operates in a working medium (16) which is located inthe space and, via a passage or throttle function(s) (14, 15), can betransferred between the variable part spaces to produce the dampingcharacteristic, characterized in that the vane (9) with associatedbearing member is produced by means of extruding aluminium or alloy, inthat the extruded product is cut for production of the respective vanewith associated bearing member and in that the respective vane isprovided with sealing members (18) which establish a seal against therelevant surfaces of the space and of the bearing member.
 2. Methodaccording to Patent claim 1 , characterized in that the tubular sidewall (30) of the body is also made by extruding aluminium or alloy, inthat the extruded product is cut to produce the respective body sidewall and in that side parts (31, 32) sealing the space are fixed to therespective cut side wall, which parts can be fixed by means of adhesivebonding, rivets, bands, welding etc.
 3. Method according to Patent claim1 or 2 , characterized in that only parts (19, 20, 21, 2 c, 2 d) of thesurfaces of the body which interact with the movable surfaces of thevane are machined for the necessary sealing against said movablesurfaces on the vane by means of sealing members.
 4. Method according toany one of Patent claims 1, 2 or 3, characterized in that, in the sidepart(s) of the body, a recess (22′) or a groove is formed, which makesit possible for the working medium, for the purpose of performing thebleed function, to pass between the part spaces within a first operatingrange of the vane, in which first operating range a small load or smallforce is damped in a vehicle using the vane damper, and in that, in asecond operating range, the vane operates beyond said groove (22′) inorder that stronger damping is effected in the second operating range.5. Method according to any one of the preceding patent claims,characterized in that, in conjunction with the production of the body,asymmetrical ducts (23, 24) are formed between said part spaces and aspace which constitutes a gas accumulator space (8), into which it ispossible for the working medium to expand against the action of a gasmedium located in the space.
 6. Vane damper which comprises a body witha first space (6) for at least one rotatable vane (9) which divides thespace into two part spaces which are located on either side of the vaneand, because of the rotatability of the vane, are variable,characterized in that the body is designed with a second space (8) whichcontains gas (25) and in that the first and second part spaces areinterconnected via one or more passages (23, 24) via which the workingmedium in the first space (6) is afforded the possibility of expandingto the second space (8) when the working medium expands and also theworking medium in the second space (8) has the possibility of beingmoved back to the first space (6) by the gas when the working mediumdecreases in volume.
 7. Vane damper according to Patent claim 5 ,characterized in that said one or more passages (23, 24) are designed tothrottle the working medium more in a direction from the first space tothe second space than in a direction from the second space to the firstspace.
 8. Vane damper (1) which comprises a body (2) with a first space(6) for at least one rotatably arranged vane (9) which divides the firstspace into two part spaces which are located on either side and, becauseof the rotatability of the vane, are variable, characterized in that, inthe fully rotated position of the vane in a first direction, a firstside part space remains so as to prevent adhesion effects between themutually opposite surfaces of the vane and of the body or cavitation inthe working medium and in that, in the fully rotated position in asecond direction, a second side part space is present in order toprevent adhesion effects or cavitation between the opposite surfaces inthis case of the vane and of the body and in the working medium (16)respectively.
 9. Vane damper (1) which comprises a body (2) with a firstspace for at least one rotatably arranged vane (9) which divides thefirst space into two part spaces which are located on either side and,because of the rotatability of the vane, are variable, characterized inthat there are arranged in the vane one or more continuous holes (13,14) and one or more shims (15) arranged at this or these hole(s), bymeans of which hole(s) a damping force/damping capacity/dampingcharacteristic brought about by the vane can be effected.
 10. Vanedamper according to Patent claim 9 , characterized in that, in or nearthe vane, one or more connections are arranged between the part spaces,which connections perform one or more bleed functions, for example oneor more grooves arranged in the delimiting surface of the body. 11.Arrangement for a vane damper (1) which, in an internal space (6),supports a rotatably mounted vane (9) which has sealing members (18)which seal the edges of the vane against space inner surfaces (19, 20,21, 2 c, 2 d) of the body, characterized in that only a part of thespace inner surfaces undergoes machining which ensures an effectivesealing function by means of the sealing member.
 12. Arrangementaccording to Patent claim 11 , characterized in that said space innersurface parts include a first curved space inner surface (19) which isopposite the free end edge surface (9 e) of the vane and is thereforefinished so as to ensure functionally reliable sealing by means of andvia a sealing member arranged at the curved surface and the front endedge surface, preferably on the free end edge of the vane, when thefront edge of the vane sweeps over the curved inner space surface (19)in the performance of its damping function/damping characteristic. 13.Arrangement according to Patent claim 11 or 12 , characterized in thatsaid inner space part surfaces include curved inner space surfaces whichare opposite an outer surface on a cylindrical bearing part (9 b)belonging to the vane, by means of which part the vane is mounted in acircular space in the body, and in that only parts, for example between10 and 30%, of said curved inner space surfaces (a, b) are machined soas to bring about reliable sealing between said outer surfaces and theparts of the curved inner space surfaces with sealing strips (27),preferably located on or in the cylindrical bearing part, in between.14. Arrangement according to Patent claim 11 , 12 or 13, characterizedin that the side parts of the body, which, together with the tubularside wall of the body, are only partially machined (ground, polishedetc.) to bring about reliable sealing between the upper and lower edgesof the vane by means of sealing strips, preferably fastened to the vane,in between.
 15. Arrangement according to any one of Patent claims 11-14,characterized in that the sealing members/sealing strips, via which thevane interacts with the respective side parts, are arranged along thelongitudinal edges of the vane, that is to say eccentrically in thevertical section of the vane, in that the vane, in said verticalsection, has a profile which tapers towards the free end, in that thevane merges with said bearing part in a cylindrical bearing housing andin that the vane has, in its widest parts, weight-reducing recesses and,in its narrower parts, passages with shims/shim packs.
 16. Arrangementfor a vane damper (1) which comprises a body (2) with spaces in which avane (9) is rotatably arranged and operates in a working medium (16)located in the space(s), and also the vane is made with a bearing unit,by means of which the rotatability of the vane can be brought about,characterized in that the bearing unit is provided with a hole, in whicha rotating member, for example a rotary spindle (11), belonging to apart (chassis, wheel, vehicle etc.) extends, the movements of which partare to be damped by the vane damper.
 17. Arrangement according to Patentclaim 16 , characterized in that the body is anchored in a vehicle orunit on or in which damping is intended to be performed by means of avane damper and in that the part which is to have its movements dampedbelongs to or is mounted in the vehicle/unit.
 18. Use of one or moreextruded aluminium or alloy products which can be cut in order toproduce units, characterized in that said product(s) are used in orderto produce as units a vane with associated bearing part, forming part ofa vane damper, and/or a tubular side wall forming part of the body of avane damper.